If building for power9 or newer, and a CR bit is spilled, LLVM may miscompile the code. This bug has been around for quite some time. It was exposed when building the rust toolchain with -mcpu=pwr9 on c9s (see RHEL-88598). The upstream bug is https://github.com/llvm/llvm-project/issues/143989, a patch is pending with pr https://github.com/llvm/llvm-project/pull/146424. Reproducible: Always Steps to Reproduce: 1. Build rust package with a power9 minimum CPU. 2. Observe strange test failures in JSON formatted output.
FEDORA-2025-18488216e7 (llvm-20.1.8-3.fc43) has been submitted as an update to Fedora 43. https://bodhi.fedoraproject.org/updates/FEDORA-2025-18488216e7
FEDORA-2025-dd4673b64d (llvm-20.1.8-3.fc42) has been submitted as an update to Fedora 42. https://bodhi.fedoraproject.org/updates/FEDORA-2025-dd4673b64d
FEDORA-2025-18488216e7 (llvm-20.1.8-3.fc43) has been pushed to the Fedora 43 stable repository. If problem still persists, please make note of it in this bug report.
FEDORA-2025-dd4673b64d has been pushed to the Fedora 42 testing repository. Soon you'll be able to install the update with the following command: `sudo dnf upgrade --enablerepo=updates-testing --refresh --advisory=FEDORA-2025-dd4673b64d` You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2025-dd4673b64d See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates.
FEDORA-2025-dd4673b64d (llvm-20.1.8-3.fc42) has been pushed to the Fedora 42 stable repository. If problem still persists, please make note of it in this bug report.